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EVMScriptCreator.sol
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EVMScriptCreator.sol
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// SPDX-FileCopyrightText: 2021 Lido <info@lido.fi>
// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.4;
/// @author psirex
/// @notice Contains methods for convenient creation
/// of EVMScripts in EVMScript factories contracts
library EVMScriptCreator {
// Id of default CallsScript Aragon's executor.
bytes4 private constant SPEC_ID = hex"00000001";
/// @notice Encodes one method call as EVMScript
function createEVMScript(
address _to,
bytes4 _methodId,
bytes memory _evmScriptCallData
) internal pure returns (bytes memory _commands) {
return
abi.encodePacked(
SPEC_ID,
_to,
uint32(_evmScriptCallData.length) + 4,
_methodId,
_evmScriptCallData
);
}
/// @notice Encodes multiple calls of the same method on one contract as EVMScript
function createEVMScript(
address _to,
bytes4 _methodId,
bytes[] memory _evmScriptCallData
) internal pure returns (bytes memory _evmScript) {
for (uint256 i = 0; i < _evmScriptCallData.length; ++i) {
_evmScript = bytes.concat(
_evmScript,
abi.encodePacked(
_to,
uint32(_evmScriptCallData[i].length) + 4,
_methodId,
_evmScriptCallData[i]
)
);
}
_evmScript = bytes.concat(SPEC_ID, _evmScript);
}
}